Figure 2.

(A) Receiver-operating characteristic curve showing the MIB-1 labeling index in the prediction of progression of sporadic spinal meningiomas. The dashed line marks the identified optimum cut-off value. (B) Kaplan-Meier analysis of tumor progression probability stratified by “MIB-1 ≥ 5%” (red line) and “MIB-1 < 5” (blue line). Vertical dashes represent censored data (constituting for progression-free at last follow-up) within the PFS curves. The time axis is right-censored at 200 months. (C) Kaplan-Meier charts of tumor progression probability stratified by “Simpson grade ≥III” (red line) and “Simpson grade I & II” (blue line). Vertical dashes represent censored data (constituting for progression-free at last follow-up) within the PFS curves. The time axis is right-censored at 200 months.